Method of electrical treatment dose setting for the electrolytic treatment of waste waters

Abstract

A waste water treatment apparatus comprising an electrode or electrode array, a DC power supply source (or supply sources) operably connected through a current modulator to the electrode or the electrode array, wherein the current modulator permits connection of the power supply to the electrode or electrode array and is itself operably connected to a pulse generator and a control system comprising at least the current modulator and the pulse generator which, in concert with the power supply is configured to provide a pulsing or modulating electrical DC current supply at variable frequency and variable duty cycle to the electrode or electrode array and to reverse the polarity of such current supply if, as and when required.

1 . A waste water treatment apparatus comprising:
 an electrode or electrode array;   a DC power supply source (or supply sources) operably connected through a current modulator to the electrode or the electrode array, wherein the current modulator permits connection of the power supply to the electrode or electrode array and is itself operably connected to a pulse generator;   a control system comprising at least the current modulator and the pulse generator which, in concert with the power supply is configured to provide a pulsing or modulating electrical DC current supply at variable frequency and variable duty cycle to the electrode or electrode array and to reverse the polarity of such current supply if, as and when required.   
     
     
         2 . The apparatus of  claim 1 , wherein the flow rate of waste water is held substantially constant. 
     
     
         3 . The apparatus of  claim 1 , wherein the control system is configured to apply a pre-set dose of electrical energy per volume of treated waste water. 
     
     
         4 . The apparatus of  claim 3 , wherein the control system is configured to provide a modulated flow of DC current to the electrode(s) at a set frequency. 
     
     
         5 . The apparatus of  claim 1 , wherein the control system is configured to manipulate the duty cycle of the DC current flowing to the electrode(s) so as to maintain the average amperage at a steady, pre-set level and thus maintain a pre-set dosage of electrical energy per unit volume of waste water passing through the treatment system. 
     
     
         6 . The apparatus of  claim 1 , wherein the control system is configured such that the modulator can also reverse the polarity of the DC current flow to the electrodes, while retaining the ability to manipulate the duty cycle and frequency of the reversed flow should this be required. 
     
     
         7 . A method of treating waste water, the method comprising passing waste water to be treated though the apparatus of  claim 1 .